// Copyright (C) 2024 Kumo inc.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

#pragma once

namespace merak {

/** @class Singleton

@brief class template to create a thread-safe singleton object

*/
template <typename T>
class Singleton {

  public:

  /**
  @brief get a reference to the singleton object
  */
  inline static T& get() {
    static T instance;
    return instance;
  }

  private:

    Singleton() = default;
    ~Singleton() = default;
    Singleton(const Singleton&)= delete;
    Singleton& operator=(const Singleton&)= delete;
};



}  // end of namespace merak -----------------------------------------------------
